Jvc Kd-s735r User manual

SERVICE MANUAL

2002/12

KD-S735R

CD RECEIVER

49762200212 KD-S735R

TABLE OF CONTENTS

1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

3 Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11

4 Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

Area Suffix

E

EX

Continental Europe

Central Europe

45

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4

789

10 11 12 RD

S

MO

RND

D

ISP

TP PTY S

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IGIT

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AUD

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1-2

SECTION 1

Important Safety Precautions

1.1 Safety Precautions

!Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

!Please use enough caution not to see the beam directly or touch it in case of an

adjustment or operation check.

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1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,

can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.

Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the

traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(3) Handling the optical pickup

• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical

pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can

easily destroy the laser diode.

1.3 Handling the traverse unit (optical pickup)

(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to

the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too

long a time when attaching it to the connector.

(3) Handle the flexible cable carefully as it may break when subjected to strong force.

(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.4 Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the CD pickup unit.

• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.

(If the flexible wire is disconnected without applying solder, the CDpickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.

1M

(caption)

Anti-static wrist strap

Conductive material

(conductive sheet) or iron plate

Front bracket

CD mechanism

control board

Damper bracket

CD mechanism ass’y

FD screw

Feed motor ass’y

FD gear Pickup unit

Soldering

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1-4

SECTION 2

Disassembly method

2.1 Main body

2.1.1 Removing the front panel assembly

(See Fig.1)

(1) Press the eject button in the lower right part of the front

panel. Remove the front panel assembly from the body.

Fig.1

2.1.2 Removing the front chassis assembly

(See Fig.2 and 3)

• Prior to performing the following procedure, remove the front

panel assembly.

(1) Release the four joint tabs aon both sides of the front

chassis assembly and remove the front chassis assembly

toward the front.

Fig.2

Fig.3

Front panel assembly

Eject button

Tab a

Front chassis assembly

Front chassis

assembly

Heat sink Tab a

Tab a

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2.1.3 Removing the heat sink

(See Fig.4)

(1) Remove the three screws Aon the left side of the body.

Fig.4

2.1.4 Removing the bottom cover

(See Fig.5 and 6)

• Prior to performing the following procedure, remove the front

panel assembly, the front chassis assembly and the heat sink.

(1) Turn over the body and unjoint the five joints bwith the

bottom cover and the body using a screwdriver.

Fig.5

Fig.6

Heat sink

AA

Joints b

Joint b

Bottom cover

Rear panel

Joints b

Joint b

Bottom cover

Rear panel

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2.1.5 Removing the main board

(See Fig.7 and 8)

• Prior to performing the following procedure, remove the front

panel assembly, the front chassis assembly, the heat sink and

the bottom cover.

(1) Remove the screw B, the two screws Cand the three

screws Dattaching the rear bracket on the back of the

body. Remove the rear panel.

(2) Remove the two screws Eattaching the main board on

the bottom of the body. Disconnect connector CN501 on

the main board in the direction of the arrow. Fig.7

Fig.8

2.1.6 Removing the CD mechanism section

(See Fig.9)

• Prior to performing the following procedure, remove the front

panel assembly, the front chassis assembly, the heat sink, the

bottom cover and the main board.

(1) Remove the three screws Fattaching the cassette mech-

anism section on the back of the top chassis.

Fig.9

Rear panel

B

D

C

Main board

E

CN501

CD mechanism section

F

Top chassis

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1-7

2.1.7 Removing the control switch board

(See Fig.10 to 12)

• Prior to performing the following procedure, remove the front

panel assembly.

(1) Remove the four screws Gattaching the rear cover on the

back of the front panel assembly.

(2) Unjoint the ten joints cwith the front panel and the rear

cover.

(3) Remove the control switch board on the back of the front

panel

Fig.10

Fig.11

Fig.12

G

GG

G

Rear cover

Joints c

Front panel

Rear cover

Joints c

Front panel

Control switch board

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1-8

2.2 CD Mechanism Assembly

2.2.1 Removing the CD mechanism control board

(See Fig.1 and 2)

(1) Unsolder the part aand bon the CD mechanism control

board.

(2) Remove the stator fixing the CD mechanism control board

and the damper bracket (To remove the stator smoothly,

pick up the center part).

(3) Remove the screw A attaching the CD mechanism control

board.

(4) Remove the CD mechanism control board in the direction

of the arrow while releasing it from the two damper bracket

slots dand the front bracket slot e.

(5) Disconnect the flexible wire from connector on the pickup

unit.

ATTENTION:

Turn the FD gear in the direction of the arrow to move the en-

tire pickup unit to the appropriate position where the flexible

wire of the CD mechanism unit can be disconnected easily.

(Refer to Fig.2)

Fig.1

Fig.2

2.2.2 Removing the loading motor

(See Fig.3 to 5)

• Prior to performing the following procedure, remove the CD

mechanism control board.

(1) Remove the two springs f attaching the CD mechanism

assembly and the front bracket.

(2) Remove the two screws Band the front bracket while

pulling the flame outward.

(3) Remove the belt and the screw C from the loading motor.

Fig.3

Fig.4

Fig.5

Front bracket

CD mechanism

control board

Damper bracket

h

c

d

b

a

DD

D

CD mechanism assembly

Ae

h

Shift the lock

Flexible wire

Pickup unit

FD gear

CD mechanism control board

Loading motor Front bracket

f

B

Front bracket Pull outward

Pull outward

Flame

C

Loading motor

Belt

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1-9

2.2.3 Removing the CD mechanism assembly

(See Fig.1, 6 to 9)

• Prior to performing the following procedure, remove the CD

mechanism control board and the front bracket (loading

motor).

(1) Remove the three screws Dand the damper bracket.

(2) Raise the both sides fix arms and move the fix plates in the

direction of the arrow to place the four shafts gas shown

in Fig.8 and 9.

(3) Remove the CD mechanism assembly and the two

springs hattaching the flame.

(4) Remove the two screws Eand both sides rear damper

brackets from the dampers. Detach the CD mechanism

assembly from the left side to the right side.

ATTENTION:

The CD mechanism assembly can be removed if only the rear

damper bracket on the left side is removed. Fig.1

Fig.6

Fig.7

Fig.8

Fig.9

Front bracket

CD mechanism

control board

Damper bracket

h

c

d

b

a

DD

D

CD mechanism assembly

Ae

h

DD

Damper bracket

CD mechanism assembly

Flame h

D

Fix plate (L)

g

Rear damper bracket

Fix arm (L)

Damper

E

Rear damper bracket

Fix arm (R)

Damper

Fix plate(R)

E

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2.2.4 Removing the feed motor assembly

(See Fig.10)

• Prior to performing the following procedure, remove the CD

mechanism control board, the front bracket (loading motor)

and the CD mechanism assembly.

(1) Remove the two screws F and the feed motor assembly.

2.2.5 Removing the pickup unit

(See Fig.10 and 11)

• Prior to performing the following procedure, remove the CD

mechanism control board, the front bracket (loading motor),

the CD mechanism assembly and the feed motor assembly.

(1) Detach the FD gear part of the pickup unit upward. Then

remove the pickup unit while pulling out the part i of the FD

screw.

ATTENTION:

When reattaching the pickup unit, reattach the part jof

the pickup unit, then the part iof the FD screw.

(2) Remove the screw Gattaching the nut push spring plate

and the pickup mount nut from the pickup unit. Pull out the

FD screw.

Fig.10

Fig.11

2.2.6 Removing the spindle motor

(See Fig.12 and 13)

• Prior to performing the following procedure, remove the CD

mechanism control board, the front bracket (loading motor),

the CD mechanism assembly and the feed motor assembly.

(1) Turn up the CD mechanism assembly and remove the two

springs kon both sides of the clamper arms. Open the

clamper arm upward.

(2) Turn the turn table, and remove the two screws Hand the

spindle motor.

Fig.12

Fig.13

Pickup unit

Part i

FD screw

Feed motor assembly

FD gear Pickup unit

Part j

Nut push spring plate

Pickup mount nut

Pickup unit

FD screw

G

kk

Spindle motor

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1-11

SECTION 3

Adjustment method

Test instruments required for adjustment

1. Digital oscilloscope (100MHz)

2. AM Standard signal generator

3. FM Standard signal generator

4. Stereo modulator

5. Electric voltmeter

6. Digital tester

7.Tracking offset meter

8.Test Disc JVC :CTS-1000

9. Extension cable for check

EXTGS004-26P x 1

Standard measuring conditions

Power supply voltage: DC14.4V(11V to 16V allowance)

Load impedance: 4 ohm (4ohm to 8ohm allowance)

Line-Out Level/Impedance:

2.0V/20k ohm load(full scall)

Output Impedance: 1k ohm

How to connect the extension cable for adjusting

Dummy load

Exclusive dummy load should be used for AM,and FM. For

FM dummy load,there is a loss of 6dB between SSG output

and antenna input.The loss of 6dB need not be considered

since direct reading of figures are applied in this working

standard.

Standard volume position

Balance and Bass &Treble volume : lndication"0"

Loudness : OFF

BBE : OFF

Frequency Band

FM 87.5MHz ~ 108.0MHz

MW 522kHz ~ 1620 kHz

LW 144kHz ~ 279kHz

EXTGS004-26P

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1-12

YES

Focus search

RF signal eye-pattern

opens

RF signal eye-pattern

remains closed

Power ON

Set Function to CD

"No disc"

display

• When correctly focused

Focus Servo Loop ON

• When the laser diode correctly

emits

Microprocessor

commands

Rough Servo Mode

CLV Servo Mode

(ProgramArea)

CLV Servo Mode

(Lead-In Area;

Digital: 0)

• RF signal

Flow of functional operation until TOC read

• When the pickup correctly moves

to the inner area of the disc

TERMINAL

Microprocessor

commands

FMO

TC9462 "53"

FEED MOTOR

+TERMINAL

IC581 "5"

REST SW

• When the disc correctly rotates

Tracking Servo Loop ON

Servo CLV

Rough

Servo

Acceleration

Microprocessor

commands

Spindle

motor (-)

IC581 "7"

0.5 Sec 0.5 Sec

0V

Hi-Z

5V

6V

4V

2V

OFF

ON

$ 83 $ 82 $ 81

14 2.2V

FSO

TA2109

SEL

TC9462

LD

CN501

57

7

$ 84

5V

0V

4V

0V

$ 8A $ 86 $ A200

5V

2.2V

0V

6V

3.2V

2V

DMO

TC9462 55

Disc inserted

Pickup feed to the inner area

Laser emitted

Disc rotates

Tracking loop closed

TOC readout

Jump to the first track

Play

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1-13

Feed Section

Focus Section

Tracking Section

Spindle Section

Is the voltage output at

IC521 pin "53" 5V or 0V?

Check the feed motor.

Is 4V present at both

sides of the feed motor?

Is the wiring for IC521

(90) ~ (100) correct?

Check IC581.

Is 6V or 2V present at

IC581 "5" and "6"?

Is 5V present at IC581

pin "11"?

Check the feed motor

connection wiring.

Check the vicinity of

IC521.

Check CD 9V

and 5V.

YES

NONO

NO

YES

When the lens is

moving:

Check the circuits in

the vicinity of IC581

pins "15" ~ "18".

Check the pickup and

its connections.

NO

YES

Does the S-search

waveform appear at

IC581 pins "17" and "18"?

Is the disk rotated?

Does the RF signal

appear at TP1?

Is 4V present at IC581

pins "7" and "8" ?

Check the spindle motor

and its wiring.

Is 4V present at IC521

pin "55" ?

Check the vicinity of

IC581.

Check IC501 and

IC521.

YES

NO

NO NO

YES

Check the circuits in the

vicinity of IC501 "19" ~

"24" or the pickup

Is the RF waveform at

TP1 distorted?

Proceed to the Tracking

section

When the disc is rotated

at first:

Check the circuit in the

vicinity of IC501 pins

"2" ~ "12".

Check IC521.

Check the pickup and

its connections.

YESYES

YES

Is the tracking error signal

output at IC501 "12"?

Approx. 1.2 V

4V

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1-14

Replacement of laser pickup

Is RF output

1.0 0.35Vp-p? Replace it.

NO

YES

O.K

Turn off the power switch and,disconnect the

power cord from the ac outlet.

Replace the pickup with a normal one.(Refer

to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on.

At this time,check that the laser emits for

about 3seconds and the objective lens moves

up and down.

Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

Maintenance of laser pickup

(1) Cleaning the pick up lens

Before you replace the pick up, please try to

clean the lens with a alcohol soaked cotton

swab.

(2) Life of the laser diode

When the life of the laser diode has expired,

the following symptoms will appear.

(1) The level of RF output (EFM output:ampli

tude of eye pattern) will be low.

(3) Semi-fixed resistor on the APC PC board

The semi-fixed resistor on the APC printed

circuit board which is attached to the pickup

is used to adjust the laser power.Since this

adjustment should be performed to match the

characteristics of the whole optical block,

do not touch the semi-fixed resistor.

If the laser power is lower than the specified

value,the laser diode is almost worn out, and

the laser pickup should be replaced.

If the semi-fixed resistor is adjusted while

the pickup is functioning normally,the laser

pickup may be damaged due to excessive

current.

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KD-S735R

1-15

SECTION 4

Description of major ICs

4.1 HA13164A (IC961) : Regulator

• Terminal layout

• Block diagram

• Pin function

123456789101112131415

Pin No. Symbol Function

1 EXTOUT Output voltage is VCC-1 V when M or H level applied to CTRL pin.

2 ANTOUT Output voltage is VCC-1 V when M or H level to CTRL pin and H level to ANT-CTRL.

3 ACCIN Connected to ACC.

4 VDDOUT Regular 5.7V.

5 SW5VOUT Output voltage is 5V when M or H level applied to CTRL pin.

6 COMPOUT Output for ACC detector.

7 ANT CTRL L:ANT output OFF, H:ANT output ON

8 VCC Connected to VCC.

9 BATT DET Low battery detect.

10 AUDIO OUT Output voltage is 9V when M or H level applied to CTRL pin.

11 CTRL L:BIAS OFF, M:BIAS ON, H:CD ON

12 CD OUT Output voltage is 8V when H level applied to CTRL pin.

13 ILM AJ Adjustment pin for ILM output voltage.

14 ILM OUT Output voltage is 10V when M or H level applied to CTRL pin.

15 GND Connected to GND.

2

1

11

12

10

15 13

14

5

4

6

3

8

9

7

ILM AJGND GND

C6

10u

C5

0.1u

C4

0.1u

C3

0.1u

AUDIO OUT

CD OUT

CTRL

ANT CTRL

EXT OUT

ANT OUT

VCC ACC

Surge Protector

BIAS TSD

C1

100u C2

0.1u

+B

ACC

BATT.DET OUT

COMPOUT

VDD OUT

SW5VOUT

ILMOUT

C7

0.1u

C8

0.1u

R1

UNIT R:

C:F

note1) TAB (header of IC)

connected to GND

TAB

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KD-S735R

1-16

4.2 LA4743K (IC301) : Power amp.

• Block diagram

11

6 20

1

4

10

15

25

13

14

16

12

9

8

5

7

2

22

17

19

18

21

23

24

3

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

IN 1

IN 2

ST BY

Vcc 1/2 Vcc 3/4

OUT 1+

OUT 1-

PWR GND1

OUT 2+

OUT 2-

PWR GND2

R.F

IN 3

IN 4

PRE GND

O

N TIME C Muting &

ON Time Control

Circuit

Protective

circuit

Protective

circuit

Mute

circuit

Ripple

Filter

Stand by

Switch

N.C

+

0.22 F

2200 F 0.022

F

0.22 F

TAB

+5V

ST ON

+

47 F

0.22 F

22 F

+

Mute 10K

+

3.3 F

OUT 3+

OUT 3-

Low Level

Mute ON

PWR GND3

OUT 4+

OUT 4-

PWR GND4

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KD-S735R

1-17

• Terminal layout

• Pin function

TA B

GND

FR-

STDBY

FR+

VP1

RR-

GND

RR+

RIPPLE

INRF

INRR

SGND

FLIN

RLIN

DNTIME

RL+

GND

RL-

VP3

FL+

MUTE

FL-

GND

NC

Pin No. Symbol Function

1 TAB Header of IC

2 GND Power GND

3 FR- Outpur(-) for front Rch

4 STDBY Stand by input

5 FR+ Output (+) for front Rch

6 VP1 Power input

7 RR- Output (-) for rear Rch

8 GND Power GND

9 RR+ Output (+) for rear Rch

10 RIPPLE Ripple filter

11 RRIN Rear Rch input

12 FRIN Front Rch input

13 SGND Signal GND

14 FLIN Front Lch input

15 RLIN Rear Lch input

16 ONTIME Power on time control

17 RL+ Output (+) for rear Lch

18 GND Power GND

19 RL- Output (-) for rear Lch

20 VP3 Power input

21 FL+ Output (+) for front

22 MUTE Muting control input

23 FL- Output (-) for front

24 GND Power GND

25 NC Non connection

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TEL 13942296513 QQ 376315150 892498299

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KD-S735R

1-18

4.3 LA6567H-X (IC501) : CD driver

• Pin layout & Blockdiagram

VCC2

V05-

V05+

V04+

V04-

V03+

V03-

V02+

V02-

V01+

V01-

VCC1

VIN1

VIN1G

FR

REV

FWD

S-GND

VCONT

VIN4

VIN4G

VCC-S

VREF-IN

REG-OUT

REG-IN

VIN3G

VIN3

VIN2G

VIN2

FR

28

27

26

25

24

23

22

21

20

19

18

17

16

15

FR

1

2

3

4

5

6

7

8

9

10

11

12

13

14

FR

CH 3,4,5

Power supply

Output control

CH5

CH4

CH2

CH1

CH3

22K 11K

5VREG(PNPTr

The outside putting)

22K

11K

CH1,2

Power supply

Level shiftLevel shiftLevel shiftLevel shift

Thermal shutdown

Input

Signal system power supply

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KD-S735R

1-19

• Pin function

- Frame(FR)at the center becomes system GND.

- Please be short-circuited on the outside and use the terminal of the power supply system and three teminals of VCC-S,

VCC1,VCC2.

Pin no. Symbol Function

1 VCC2 CH3,4,5 Power supply( It is short with VCC1,VCC-S)

2 V05- Loading output(-)

3 V05+ Loading terminal (+)

4 V04+ CH4 Output terminal(+)

5 V04- CH4 Output terminal(-)

6 V03+ CH3 Output terminal(+)

7 V03- CH3 Output terminal(-)

8 V02+ CH2 Output terminal(+)

9 V02- CH2 Output terminal(-)

10 V01+ CH1 Output terminal(+)

11 V01- CH1 Output terminal(-)

12 VCC1 CH1,2(BTL) Power supply(It is short with VCC-S,VCC2)

13 VIN1 CH1 Input terminal

14 VIN1G CH1 Input terminal(For gain adjustment)

15 VIN2 CH2 Input terminal

16 VIN2G CH2 Input terminal(For gain adjustment)

17 VIN3 CH3 Input terminal

18 VIN3G CH3 Input terminal(For gain adjustment)

19 REG-IN Regulator terminal(Outside putting PNP base)

20 REG-OUT Regulator terminal(Outside putting PNP collector)

21 VREF-IN Standard voltage input terminal

22 VCC-S Signal system power supply(It is short with VCC1,VCC2)

23 VIN4G CH4 Input terminal(For gain adjustment)

24 VIN4 CH4 Input terminal

25 VCONT 5CH(VLO) Output voltage set terminal

26 S-GND Signal system GND

27 FWD 5CH(VLO)Signal output switch terminal(FWD) ,Input of logic of loading part

28 REV 5CH(VLO)Signal output switch terminal(REV), Input of logic of loading part

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TEL 13942296513 QQ 376315150 892498299

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KD-S735R

1-20

4.4 LC75823W (IC601) : LCD driver

• Pin Layout & Symbol

• Pin function

Pin No. Symbol I/O Functions

1 to 52 S1 to S52 O Segment output pins used to display data transferred by serial data input.

53 to 55 COM1 to COM3 O Common driver output pins. The frame frequency is given by : t0=(fosc/384)Hz.

56 VDD - Power supply connection. Provide a voltage of between 4.5 and 6.0V.

57 INH I Display turning off input pin.

INT="L" (Vss) ----- off (S1 to S52, COM1 to COM3="L"

INT="H" (VDD)----- on

Serial data can be transferred in display off mode.

58 VDD1 I Used for applying the LCD drive 2/3 bias voltage externally.

Must be connected to VDD2 when a 1/2 bias drive scheme is used.

59 VDD2 I Used for applying the LCD drive 1/3 bias voltage externally.

Must be connected to VDD1 when a 1/2 bias drive scheme is used.

60 VSS - Power supply connection. Connect to GND.

61 OSC I/O Oscillator connection.

An oscillator circuit is formed by connecting an external resistor and capacitor at this pin.

62 CE I Serial data interface connection to the controller. CE : Chip enable

63 CL I Serial data interface connection to the controller. CL : Sync.clock

64 DI I Serial data interface connection to the controller. DI : Transfer data

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

S15

S16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

S48

S47

S46

S45

S44

S43

S42

S41

S40

S39

S38

S37

S36

S35

S34

S33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

DI

CL

CE

OSC

Vss

VDD2

VDD1

INH

VDD

COM3

COM2

COM1

S52

S51

S50

S49

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TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

JVC KD-S735R User manual

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